If you are using or Windows 7 Professional , BitLocker is not included, and there is no official Microsoft update to add it to these versions. How to Enable BitLocker on Windows 7 Professional Edition?
: Designed for businesses and typically available through volume licensing. download bitlocker drive encryption for windows 7
: A specialized version for fixed-function devices. If you are using or Windows 7 Professional
BitLocker Drive Encryption is not available as a standalone download for Windows 7. Instead, it is an integrated feature built directly into the operating system's disk management system. BitLocker is not included
BitLocker is exclusively available in the following high-end editions of Windows 7: : The most feature-rich consumer edition.